174 Testing the Value of Guns by Flri/uy under Water. 



From the above illustration it will be seen, supposing the 

 cartridges to be all of the same length, that the bullet in the 

 TJ. S. Army rifle had to travel through (39 1-8—35 1-8) 4 

 inches more water than in the U. S. Model rifle, and that the 

 bullet from the Sharp's rifle did not have to traverse as much 

 water by (35 1-8—30 1-8) 5 inches, as the bullet of the U. S. 

 Model rifle. Correction must therefore be made, before any 

 true comparison of the rifles can be reached. With respect to 

 the cartridges, also, some correction must be made, as they 

 are not of the same length. 



CARTRIDGES. 



U. S. Model and 

 Sharp's Rifles. 



U. S. Army Rifle. 



Spanish Model 

 Rifle. 



It is evident that if the measurements are taken from the 

 cartridge, they must be from that part of it which fits the barrel, 

 and not from the end of the bullet; as the bullet has a more or 

 less conical shape, it is therefore surrounded by water when 

 the rifle is submerged. In the cartridges for the U. S. Army, 

 TJ. S. Model, and Sharp's rifles, the end of the metallic case is 



